Negative / Null Result ReportMedicine
Peng, Wang, Xiao et al. · 2026 · Journal of minimally invasive gynecology
To compare the effectiveness and safety of transvaginal natural orifice transluminal endoscopic surgery (vNOTES) pelvic reconstruction (PRC), vNOTES presacral-uterosacral ligament suspension (PULS), and sacrospinous ligament fixation…
View details →DOI: 10.1016/j.jmig.2026.06.024 Negative / Null Result ReportOpen accessComputer Science
D. Abler, O. Pusterla, A. Joye-Kühnis et al. · 2025 · arXiv
Background: Radiomics shows promise in characterizing glioblastoma, but its added value over clinical and molecular predictors has yet to be proven. This study assessed the added value of conventional radiomics (CR) and deep learning (DL) MRI radiomics for glioblastoma prognosis ( 6 months survival) on a large multi-center dataset. Methods: After patient selection, our curated dataset gathers 1152 glioblastoma (WHO 2016) patients from five Swiss centers and one public source. It included clinical (age, gender), molecular (MGMT, IDH), and baseline MRI data (T1, T1 contrast, FLAIR, T2)
Failed Experiment Report
Isaac Unah · 2026 · SSRN Electronic Journal
The paper argues that Eritrea's Constitution — ratified after a costly independence struggle and designed to establish democracy, rule of law, and human rights — has never been implemented in nearly 30 years. The failure is attributed…
View details →DOI: 10.2139/ssrn.6289978 Negative / Null Result Report
Ye-seul Park, Ja-eun Kwak, Ho-ryong Yoo et al. · 2024 · The Journal of Internal Korean Medicine
Background: Unilateral vocal cord paralysis can occur due to various causes. Among them, unilateral vocal cord paralysis that takes place after endotracheal intubation is often caused by damage to the left recurrent nerve branch during…
View details →DOI: 10.22246/jikm.2024.45.6.1309 Negative / Null Result Report
Yigit Atilgan, K. Ozgur Demirtas, A. Doruk Gunaydin · 2024 · SSRN Electronic Journal
This paper investigates whether industrial companies with higher toxic emissions outperform those with lower toxic emissions. First, the highest polluters do not consistently outperform the lowest polluters in an almost stochastic…
View details →DOI: 10.2139/ssrn.4828452 Negative / Null Result Report
Hamid Z. Ahmadi, Janna Khoroujik, Rafiqul B. Rafiq · 2011 · Journal of Business & Economics Research (JBER)
How often should a portfolio be rebalanced?<span…
View details →DOI: 10.19030/jber.v5i4.2538 Negative / Null Result Report
Alfred Rex Bunn · 2024 · Smart Tourism
The most famous tourist attractions in the southern hemisphere, in the nineteenth century were the Pink and White Terraces—New Zealand’s lost Eighth Wonder of the World. They were assumed lost in an1886 eruption. The unpublished 2018…
View details →DOI: 10.54517/st2174 Negative / Null Result Report
Alfred Rex Bunn · 2023 · Smart Tourism
The most famous tourist attractions in the southern hemisphere, in the nineteenth century were the Pink and White Terraces—New Zealand’s lost Eighth Wonder of the World. They were assumed lost in an1886 eruption. The unpublished 2018…
View details →DOI: 10.54517/st.v4i1.2174 Negative / Null Result ReportOpen accessPhysics
Patrick McDonald · 2009 · arXiv
I show how to reintroduce velocity dispersion into perturbation theory (PT) calculations of structure in the Universe, i.e., how to go beyond the pressureless fluid approximation, starting from first principles. This addresses a possible deficiency in uses of PT to compute clustering on the weakly non-linear scales that will be critical for probing dark energy. Specifically, I show how to derive a non-negligible value for the (initially tiny) velocity dispersion of dark matter particles, , where δv is the deviation of particle velocities from the local bulk flow. The calculation is essen
Negative / Null Result ReportMedicine
Rocha, Dos Anjos, Pinho et al. · 2026 · Journal of dentistry
This 12-month, double-blind, parallel, randomized controlled trial compared the material fracture/retention rates of occluso-proximal direct composite resin restorations associated with polyethylene fiber (CR+PF; Ribbond®) with…
View details →DOI: 10.1016/j.jdent.2026.106863 Negative / Null Result ReportMedicine
Kim, Yang, Kuang et al. · 2026 · Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons
Conventional cephalometry relies on measurements derived from a limited set of landmarks and population-based norms, which may not fully capture individual skeletal form. Although evaluated independently, many cephalometric variables…
View details →DOI: 10.1016/j.joms.2026.06.005 Negative / Null Result ReportMedicine
Olson, Perera, Kamal et al. · 2026 · Journal of clinical neuroscience : official journal of the Neurosurgical Society of Australasia
Quantitative pupillometry (QP) provides a reliable measure of the pupillary light reflex. The pupil accommodation reflex (P-AR) occurs when there is a change in visual focus from near to far or from far to near. The ability to measure the…
View details →DOI: 10.1016/j.jocn.2026.112161 Negative / Null Result ReportMedicine
Jiang, Zhu, Gan et al. · 2026 · European journal of radiology
This study aimed to investigate the effectiveness and safety of endovascular treatment (EVT) in patients with large ischemic strokes assessed by non-contrast CT (NCCT) within the extended time window. This study was a sub-analysis of a…
View details →DOI: 10.1016/j.ejrad.2026.113034 Negative / Null Result ReportMedicine
Zhao, Wang · 2026 · Acta psychologica
Handwashing, as a common physical cleansing behavior, not only serves a physiological cleaning function but is also believed to symbolically "wash away" emotional experiences or mental residues. Previous research has primarily focused on…
View details →DOI: 10.1016/j.actpsy.2026.107323 Negative / Null Result ReportMedicine
Karnati, Wu, Kaghazchi et al. · 2026 · Journal of neurosurgery. Spine
The aim of this study was to evaluate the impact of initial postoperative gabapentinoid prescription on chronic postoperative opioid use in patients who underwent short-segment lumbar instrumentation by using a large multicenter electronic…
View details →DOI: 10.3171/2026.2.spine25802 Negative / Null Result ReportMedicine
Chen, Maddali, Langlotz et al. · 2026 · Journal of medical Internet research
Most clinically relevant data are in unstructured clinical notes, which are verbose and imprecise, making structured data extraction a costly bottleneck for screening patients for studies or maintaining health care registries. This…
View details →DOI: 10.2196/90547 Negative / Null Result ReportMedicine
Fuentes-Expósito, Frid, Muñoz-Mateu et al. · 2026 · JCO clinical cancer informatics
We evaluated whether offering access to a multicomponent mHealth app improves quality of life (QoL) and psychosocial outcomes among breast cancer survivors under pragmatic, nonprescriptive conditions. In this single-center, randomized,…
View details →DOI: 10.1200/cci-26-00025 Negative / Null Result ReportMedicine
Esposito, Bocari, Cho et al. · 2026 · The International journal of oral & maxillofacial implants
This multicenter randomized controlled trial compared the clinical effectiveness of 7.0-mm wide-diameter implants with 5.0-mm conventional-diameter implants placed immediately after molar extraction. Thirty-nine patients needing a single…
View details →DOI: 10.11607/jomi.11536 Negative / Null Result ReportMedicine
Li, Ma, Liu et al. · 2026 · Tropical animal health and production
In this study, we used lactic acid bacteria to ferment the byproduct of Arundo donax papermaking, Arundo donax juice (ADJ), to obtain fermented Arundo donax juice (FADJ). We aimed to investigate the effects of FADJ on the growth…
View details →DOI: 10.1007/s11250-026-05106-6 Negative / Null Result ReportMedicine
Zang, Yan, Dong et al. · 2026 · The Journal of craniofacial surgery
Scar is an inevitable pathological product of tissue injury repair, and pathological scars often occur in exposed areas, bringing severe psychological burden and economic losses to patients. With the popularization of digital healthcare,…
View details →DOI: 10.1097/scs.0000000000013099 Negative / Null Result ReportMedicine
Li, Sugita, Togawa et al. · 2026 · Frontiers in plant science
High planting densities in indoor horticulture often accelerate lower-leaf chlorophyll degradation, increasing trimming frequency, reducing effective photosynthetic area, and raising labor costs. While spectral composition has been widely…
View details →DOI: 10.3389/fpls.2026.1817114 Negative / Null Result ReportMedicine
Hali, Mahmoudi, Namdar et al. · 2026 · Dental research journal
Laser therapy with fluoride-containing material, such as casein phosphopeptide-amorphous calcium phosphate (CPP-ACP), is a new technique for caries prevention. The purpose of this study is to investigate the effect of CPP-ACP, fluoride…
View details →DOI: 10.4103/drj.drj_556_24 Negative / Null Result ReportMedicine
Yang, Zhu, Chen et al. · 2026 · Frontiers in neuroscience
To observe the therapeutic effects of deep transcranial magnetic stimulation (dTMS) and repetitive transcranial magnetic stimulation (rTMS) on upper and lower limb motor dysfunction in patients with basal ganglia infarction, and to…
View details →DOI: 10.3389/fnins.2026.1870537 Negative / Null Result ReportMedicine
Yao, Fang, Xu et al. · 2026 · Frontiers in medicine
To investigate the discrepancies between fall risk and fall awareness among hospitalized elderly cataract patients, providing a basis for implementing precise fall prevention assessments and interventions in clinical practice. Using…
View details →DOI: 10.3389/fmed.2026.1851395 Negative / Null Result ReportMedicine
Yu, Li, Cai et al. · 2026 · Frontiers in medicine
This study directly compares the diagnostic performance of two routinely available, non-invasive techniques-ultrasound-derived fat fraction (UDFF) and non-contrast computed tomography (NCCT)-for screening and grading hepatic steatosis…
View details →DOI: 10.3389/fmed.2026.1799359 Negative / Null Result ReportMedicine
Mahmoud, Elrefaei, Shata et al. · 2026 · Frontiers in oral health
The literature regarding the use of injectable platelet- rich fibrin (i-PRF) for root coverage is scarce. Therefore, this RCT aimed to evaluate and compare the effect of using connective tissue graft (CTG) with and without i-PRF using the…
View details →DOI: 10.3389/froh.2026.1801423 Negative / Null Result ReportMedicine
Fu, Yao, Zhang et al. · 2026 · Frontiers in cardiovascular medicine
The safety of achieving ultra-low low-density lipoprotein cholesterol (LDL-C) levels in acute coronary syndrome (ACS) patients on dual antiplatelet therapy (DAPT), particularly regarding global coagulability, specific platelet reactivity,…
View details →DOI: 10.3389/fcvm.2026.1804585 Negative / Null Result ReportMedicine
Kurokawa, Taniguchi, Nakaniwa et al. · 2026 · Foot & ankle orthopaedics
Varus-type ankle osteoarthritis (OA) is often managed conservatively; however, surgical intervention is required in some patients. Identifying factors associated with transition to surgery may help optimize treatment timing. This…
View details →DOI: 10.1177/24730114261454964 Negative / Null Result ReportMedicine
Cui, Liang, Feng et al. · 2026 · Journal of bone and joint infection
Background : Periprosthetic joint infection (PJI) is a devastating complication of arthroplasty and is difficult to diagnose accurately. This study aims to explore the value of neutrophil extracellular traps in synovial fluid (SF-NETs,…
View details →DOI: 10.5194/jbji-11-363-2026 Negative / Null Result ReportMedicine
Guo, Cao, Xiao et al. · 2026 · Plants (Basel, Switzerland)
Grain for Green, as an important ecological restoration method, profoundly affects soil nitrogen (N) cycling by altering the soil physicochemical properties and microbial community. Soil nitrogen mineralization is a key process in the…
View details →DOI: 10.3390/plants15121892 